Greg Pratt

Dr. Gregory "Greg" Pratt is a fictional character on the United States television show ER, portrayed by Mekhi Phifer from April 4, 2002 to September 25, 2008. Mekhi Phifer was removed from the main cast opening credits in the 2nd episode of season 15.

Early Beginnings at County

Pratt's first appearance as a main character was late in Season 8 in the episode "Orion in the Sky" (2002), as a smart but arrogant intern from VA hospital. He meets Dr. Mark Greene on Greene's last day at County and is initially dismissive of him, before becoming more measured when he learns of Mark's terminal cancer, and by day's end he has learned a little about practicing medicine from Dr. Greene. Dr. Pratt wasn't present at Dr. Mark Greene's funeral but in flashback episode in Season 12 "Body & Soul", it revealed Dr. Pratt worked that day at the hospital since it was understaffed with most of the doctors at Dr. Greene's memorial. Pratt later inherits Dr. Greene's locker.

In the beginning of his residency, Pratt shows immediate leadership and quick precision. But his limited experience and cowboy antics often led Pratt to collide with his chief resident Dr. John Carter and other attendings over many occasions, including a procedure he was unqualified to do (though the patient survived) and resuscitating a patient who had been declared dead, and was brain-dead upon his "revival". He initially clashed with med student Michael Gallant as Michael's military background made him more by-the-book whereas Pratt liked to go around the rules, but they later became close friends. During the critical smallpox outbreak, Pratt proved his skills and courage as a swift physician by helping Dr. Luka Kovač and Dr. Jing-Mei Chen save Dr. Romano's life. The entire hospital is thrown into chaos during the evacuation gone awry, and he along with Dr. John Carter, Abby Lockhart, and Dr. Jing-Mei "Deb" Chen were forced into quarantine in the ER.